SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the ratio of proton/neutron in mercury, 200Hg? (Z=80)
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3:2
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2:3
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1:2
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4:5
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Explanation:
Detailed explanation-1: -Answer and Explanation: The atomic number (i.e., number of protons) of Hg is 80. The mass number (i.e. number of protons+number of neutrons) of 200Hg 200 H g is 200. As the atomic number of Hg is 80, therefore, the number of neutrons in 200Hg 200 H g is (200-80) or 120.
Detailed explanation-2: -The ratio of neutrons to protons in a stable nucleus is thus around 1:1 for small nuclei (Z < 20). The ratio increases slowly with atomic number up to about 1.58 at high Z.
Detailed explanation-3: -Mercury contains 80 protons and 80 electrons and 120 neutrons.
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